Door stop



FIG. 1 is a top and front perspective view of a door stop embodying my new design;

FIG. 2 is a front elevational view thereof, the rear being identical;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof, both sides being identical. 

The ornamental design for a door stop, as shown and described. 